All these the daughters of old Nereus were, / Which have the sea in charge to them assign'd, / To rule his tides, and surges to uprear, / To bring forth storms, or fast them to upbind, / And sailors save from wrecks of wrathful wind.

He fixed me with a sickly grin, and said, I told you it wouldn't work!

Energy has seldom been found where we need it when we want it. Ancient nomads, wishing to ward off the evening chill and enjoy a meal around a campfire, had to collect wood and then spend time and effort coaxing the heat of friction out from between sticks to kindle a flame.

Physician: I have viewed your urine, and the hypostasis, / Thick and obscure, doth make the danger great.